Can you imagine enjoying the presence of the moon in your pocket? The Handheld STEM Moon Projector allows children to project the moon at the press of a button. Using 3 AG13 button batteries and comprised of completely harmless materials, the Handheld STEM Moon Projector is the ideal way to study the moon, up close and personal. STEM astrology is the best way to pass the time. Welcome to the personal moon viewer!